/*! Select for DataTables 1.3.1
 * 2015-2019 SpryMedia Ltd - datatables.net/license/mit
 */

/**
 * @summary     Select for DataTables
 * @description A collection of API methods, events and buttons for DataTables
 *   that provides selection options of the items in a DataTable
 * @version     1.3.1
 * @file        dataTables.select.js
 * @author      SpryMedia Ltd (www.sprymedia.co.uk)
 * @contact     datatables.net/forums
 * @copyright   Copyright 2015-2019 SpryMedia Ltd.
 *
 * This source file is free software, available under the following license:
 *   MIT license - http://datatables.net/license/mit
 *
 * This source file is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the license files for details.
 *
 * For details please refer to: http://www.datatables.net/extensions/select
 */
(function (factory) {
  if (typeof define === 'function' && define.amd) {
    // AMD
    define(['jquery', 'datatables.net'], function ($) {
      return factory($, window, document);
    });
  } else if (typeof exports === 'object') {
    // CommonJS
    module.exports = function (root, $) {
      if (!root) {
        root = window;
      }

      if (!$ || !$.fn.dataTable) {
        $ = require('datatables.net')(root, $).$;
      }

      return factory($, root, root.document);
    };
  } else {
    // Browser
    factory(jQuery, window, document);
  }
}(function ($, window, document, undefined) {
  'use strict';
  var DataTable = $.fn.dataTable;


// Version information for debugger
  DataTable.select = {};

  DataTable.select.version = '1.3.1';

  DataTable.select.init = function (dt) {
    var ctx = dt.settings()[0];
    var init = ctx.oInit.select;
    var defaults = DataTable.defaults.select;
    var opts = init === undefined ?
      defaults :
      init;

    // Set defaults
    var items = 'row';
    var style = 'api';
    var blurable = false;
    var toggleable = true;
    var info = true;
    var selector = 'td, th';
    var className = 'selected';
    var setStyle = false;

    ctx._select = {};

    // Initialisation customisations
    if (opts === true) {
      style = 'os';
      setStyle = true;
    } else if (typeof opts === 'string') {
      style = opts;
      setStyle = true;
    } else if ($.isPlainObject(opts)) {
      if (opts.blurable !== undefined) {
        blurable = opts.blurable;
      }

      if (opts.toggleable !== undefined) {
        toggleable = opts.toggleable;
      }

      if (opts.info !== undefined) {
        info = opts.info;
      }

      if (opts.items !== undefined) {
        items = opts.items;
      }

      if (opts.style !== undefined) {
        style = opts.style;
        setStyle = true;
      } else {
        style = 'os';
        setStyle = true;
      }

      if (opts.selector !== undefined) {
        selector = opts.selector;
      }

      if (opts.className !== undefined) {
        className = opts.className;
      }
    }

    dt.select.selector(selector);
    dt.select.items(items);
    dt.select.style(style);
    dt.select.blurable(blurable);
    dt.select.toggleable(toggleable);
    dt.select.info(info);
    ctx._select.className = className;


    // Sort table based on selected rows. Requires Select Datatables extension
    $.fn.dataTable.ext.order['select-checkbox'] = function (settings, col) {
      return this.api().column(col, {order: 'index'}).nodes().map(function (td) {
        if (settings._select.items === 'row') {
          return $(td).parent().hasClass(settings._select.className);
        } else if (settings._select.items === 'cell') {
          return $(td).hasClass(settings._select.className);
        }
        return false;
      });
    };

    // If the init options haven't enabled select, but there is a selectable
    // class name, then enable
    if (!setStyle && $(dt.table().node()).hasClass('selectable')) {
      dt.select.style('os');
    }
  };

  /*

  Select is a collection of API methods, event handlers, event emitters and
  buttons (for the `Buttons` extension) for DataTables. It provides the following
  features, with an overview of how they are implemented:

  ## Selection of rows, columns and cells. Whether an item is selected or not is
     stored in:

  * rows: a `_select_selected` property which contains a boolean value of the
    DataTables' `aoData` object for each row
  * columns: a `_select_selected` property which contains a boolean value of the
    DataTables' `aoColumns` object for each column
  * cells: a `_selected_cells` property which contains an array of boolean values
    of the `aoData` object for each row. The array is the same length as the
    columns array, with each element of it representing a cell.

  This method of using boolean flags allows Select to operate when nodes have not
  been created for rows / cells (DataTables' defer rendering feature).

  ## API methods

  A range of API methods are available for triggering selection and de-selection
  of rows. Methods are also available to configure the selection events that can
  be triggered by an end user (such as which items are to be selected). To a large
  extent, these of API methods *is* Select. It is basically a collection of helper
  functions that can be used to select items in a DataTable.

  Configuration of select is held in the object `_select` which is attached to the
  DataTables settings object on initialisation. Select being available on a table
  is not optional when Select is loaded, but its default is for selection only to
  be available via the API - so the end user wouldn't be able to select rows
  without additional configuration.

  The `_select` object contains the following properties:

  ```
  {
    items:string       - Can be `rows`, `columns` or `cells`. Defines what item
                         will be selected if the user is allowed to activate row
                         selection using the mouse.
    style:string       - Can be `none`, `single`, `multi` or `os`. Defines the
                         interaction style when selecting items
    blurable:boolean   - If row selection can be cleared by clicking outside of
                         the table
    toggleable:boolean - If row selection can be cancelled by repeated clicking
                         on the row
    info:boolean       - If the selection summary should be shown in the table
                         information elements
  }
  ```

  In addition to the API methods, Select also extends the DataTables selector
  options for rows, columns and cells adding a `selected` option to the selector
  options object, allowing the developer to select only selected items or
  unselected items.

  ## Mouse selection of items

  Clicking on items can be used to select items. This is done by a simple event
  handler that will select the items using the API methods.

   */


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Local functions
   */

  /**
   * Add one or more cells to the selection when shift clicking in OS selection
   * style cell selection.
   *
   * Cell range is more complicated than row and column as we want to select
   * in the visible grid rather than by index in sequence. For example, if you
   * click first in cell 1-1 and then shift click in 2-2 - cells 1-2 and 2-1
   * should also be selected (and not 1-3, 1-4. etc)
   *
   * @param  {DataTable.Api} dt   DataTable
   * @param  {object}        idx  Cell index to select to
   * @param  {object}        last Cell index to select from
   * @private
   */
  function cellRange(dt, idx, last) {
    var indexes;
    var columnIndexes;
    var rowIndexes;
    var selectColumns = function (start, end) {
      if (start > end) {
        var tmp = end;
        end = start;
        start = tmp;
      }

      var record = false;
      return dt.columns(':visible').indexes().filter(function (i) {
        if (i === start) {
          record = true;
        }

        if (i === end) { // not else if, as start might === end
          record = false;
          return true;
        }

        return record;
      });
    };

    var selectRows = function (start, end) {
      var indexes = dt.rows({search: 'applied'}).indexes();

      // Which comes first - might need to swap
      if (indexes.indexOf(start) > indexes.indexOf(end)) {
        var tmp = end;
        end = start;
        start = tmp;
      }

      var record = false;
      return indexes.filter(function (i) {
        if (i === start) {
          record = true;
        }

        if (i === end) {
          record = false;
          return true;
        }

        return record;
      });
    };

    if (!dt.cells({selected: true}).any() && !last) {
      // select from the top left cell to this one
      columnIndexes = selectColumns(0, idx.column);
      rowIndexes = selectRows(0, idx.row);
    } else {
      // Get column indexes between old and new
      columnIndexes = selectColumns(last.column, idx.column);
      rowIndexes = selectRows(last.row, idx.row);
    }

    indexes = dt.cells(rowIndexes, columnIndexes).flatten();

    if (!dt.cells(idx, {selected: true}).any()) {
      // Select range
      dt.cells(indexes).select();
    } else {
      // Deselect range
      dt.cells(indexes).deselect();
    }
  }

  /**
   * Disable mouse selection by removing the selectors
   *
   * @param {DataTable.Api} dt DataTable to remove events from
   * @private
   */
  function disableMouseSelection(dt) {
    var ctx = dt.settings()[0];
    var selector = ctx._select.selector;

    $(dt.table().container())
      .off('mousedown.dtSelect', selector)
      .off('mouseup.dtSelect', selector)
      .off('click.dtSelect', selector);

    $('body').off('click.dtSelect' + _safeId(dt.table().node()));
  }

  /**
   * Attach mouse listeners to the table to allow mouse selection of items
   *
   * @param {DataTable.Api} dt DataTable to remove events from
   * @private
   */
  function enableMouseSelection(dt) {
    var container = $(dt.table().container());
    var ctx = dt.settings()[0];
    var selector = ctx._select.selector;
    var matchSelection;

    container
      .on('mousedown.dtSelect', selector, function (e) {
        // Disallow text selection for shift clicking on the table so multi
        // element selection doesn't look terrible!
        if (e.shiftKey || e.metaKey || e.ctrlKey) {
          container
            .css('-moz-user-select', 'none')
            .one('selectstart.dtSelect', selector, function () {
              return false;
            });
        }

        if (window.getSelection) {
          matchSelection = window.getSelection();
        }
      })
      .on('mouseup.dtSelect', selector, function () {
        // Allow text selection to occur again, Mozilla style (tested in FF
        // 35.0.1 - still required)
        container.css('-moz-user-select', '');
      })
      .on('click.dtSelect', selector, function (e) {
        var items = dt.select.items();
        var idx;

        // If text was selected (click and drag), then we shouldn't change
        // the row's selected state
        if (matchSelection) {
          var selection = window.getSelection();

          // If the element that contains the selection is not in the table, we can ignore it
          // This can happen if the developer selects text from the click event
          if (!selection.anchorNode || $(selection.anchorNode).closest('table')[0] === dt.table().node()) {
            if (selection !== matchSelection) {
              return;
            }
          }
        }

        var ctx = dt.settings()[0];
        var wrapperClass = $.trim(dt.settings()[0].oClasses.sWrapper).replace(/ +/g, '.');

        // Ignore clicks inside a sub-table
        if ($(e.target).closest('div.' + wrapperClass)[0] != dt.table().container()) {
          return;
        }

        var cell = dt.cell($(e.target).closest('td, th'));

        // Check the cell actually belongs to the host DataTable (so child
        // rows, etc, are ignored)
        if (!cell.any()) {
          return;
        }

        var event = $.Event('user-select.dt');
        eventTrigger(dt, event, [items, cell, e]);

        if (event.isDefaultPrevented()) {
          return;
        }

        var cellIndex = cell.index();
        if (items === 'row') {
          idx = cellIndex.row;
          typeSelect(e, dt, ctx, 'row', idx);
        } else if (items === 'column') {
          idx = cell.index().column;
          typeSelect(e, dt, ctx, 'column', idx);
        } else if (items === 'cell') {
          idx = cell.index();
          typeSelect(e, dt, ctx, 'cell', idx);
        }

        ctx._select_lastCell = cellIndex;
      });

    // Blurable
    $('body').on('click.dtSelect' + _safeId(dt.table().node()), function (e) {
      if (ctx._select.blurable) {
        // If the click was inside the DataTables container, don't blur
        if ($(e.target).parents().filter(dt.table().container()).length) {
          return;
        }

        // Ignore elements which have been removed from the DOM (i.e. paging
        // buttons)
        if ($(e.target).parents('html').length === 0) {
          return;
        }

        // Don't blur in Editor form
        if ($(e.target).parents('div.DTE').length) {
          return;
        }

        clear(ctx, true);
      }
    });
  }

  /**
   * Trigger an event on a DataTable
   *
   * @param {DataTable.Api} api      DataTable to trigger events on
   * @param  {boolean}      selected true if selected, false if deselected
   * @param  {string}       type     Item type acting on
   * @param  {boolean}      any      Require that there are values before
   *     triggering
   * @private
   */
  function eventTrigger(api, type, args, any) {
    if (any && !api.flatten().length) {
      return;
    }

    if (typeof type === 'string') {
      type = type + '.dt';
    }

    args.unshift(api);

    $(api.table().node()).trigger(type, args);
  }

  /**
   * Update the information element of the DataTable showing information about the
   * items selected. This is done by adding tags to the existing text
   *
   * @param {DataTable.Api} api DataTable to update
   * @private
   */
  function info(api) {
    var ctx = api.settings()[0];

    if (!ctx._select.info || !ctx.aanFeatures.i) {
      return;
    }

    if (api.select.style() === 'api') {
      return;
    }

    var rows = api.rows({selected: true}).flatten().length;
    var columns = api.columns({selected: true}).flatten().length;
    var cells = api.cells({selected: true}).flatten().length;

    var add = function (el, name, num) {
      el.append($('<span class="select-item"/>').append(api.i18n(
        'select.' + name + 's',
        {_: '%d ' + name + 's selected', 0: '', 1: '1 ' + name + ' selected'},
        num
      )));
    };

    // Internal knowledge of DataTables to loop over all information elements
    $.each(ctx.aanFeatures.i, function (i, el) {
      el = $(el);

      var output = $('<span class="select-info"/>');
      add(output, 'row', rows);
      add(output, 'column', columns);
      add(output, 'cell', cells);

      var exisiting = el.children('span.select-info');
      if (exisiting.length) {
        exisiting.remove();
      }

      if (output.text() !== '') {
        el.append(output);
      }
    });
  }

  /**
   * Initialisation of a new table. Attach event handlers and callbacks to allow
   * Select to operate correctly.
   *
   * This will occur _after_ the initial DataTables initialisation, although
   * before Ajax data is rendered, if there is ajax data
   *
   * @param  {DataTable.settings} ctx Settings object to operate on
   * @private
   */
  function init(ctx) {
    var api = new DataTable.Api(ctx);

    // Row callback so that classes can be added to rows and cells if the item
    // was selected before the element was created. This will happen with the
    // `deferRender` option enabled.
    //
    // This method of attaching to `aoRowCreatedCallback` is a hack until
    // DataTables has proper events for row manipulation If you are reviewing
    // this code to create your own plug-ins, please do not do this!
    ctx.aoRowCreatedCallback.push({
      fn: function (row, data, index) {
        var i, ien;
        var d = ctx.aoData[index];

        // Row
        if (d._select_selected) {
          $(row).addClass(ctx._select.className);
        }

        // Cells and columns - if separated out, we would need to do two
        // loops, so it makes sense to combine them into a single one
        for (i = 0, ien = ctx.aoColumns.length; i < ien; i++) {
          if (ctx.aoColumns[i]._select_selected || (d._selected_cells && d._selected_cells[i])) {
            $(d.anCells[i]).addClass(ctx._select.className);
          }
        }
      },
      sName: 'select-deferRender'
    });

    // On Ajax reload we want to reselect all rows which are currently selected,
    // if there is an rowId (i.e. a unique value to identify each row with)
    api.on('preXhr.dt.dtSelect', function () {
      // note that column selection doesn't need to be cached and then
      // reselected, as they are already selected
      var rows = api.rows({selected: true}).ids(true).filter(function (d) {
        return d !== undefined;
      });

      var cells = api.cells({selected: true}).eq(0).map(function (cellIdx) {
        var id = api.row(cellIdx.row).id(true);
        return id ?
          {row: id, column: cellIdx.column} :
          undefined;
      }).filter(function (d) {
        return d !== undefined;
      });

      // On the next draw, reselect the currently selected items
      api.one('draw.dt.dtSelect', function () {
        api.rows(rows).select();

        // `cells` is not a cell index selector, so it needs a loop
        if (cells.any()) {
          cells.each(function (id) {
            api.cells(id.row, id.column).select();
          });
        }
      });
    });

    // Update the table information element with selected item summary
    api.on('draw.dtSelect.dt select.dtSelect.dt deselect.dtSelect.dt info.dt', function () {
      info(api);
    });

    // Clean up and release
    api.on('destroy.dtSelect', function () {
      disableMouseSelection(api);
      api.off('.dtSelect');
    });
  }

  /**
   * Add one or more items (rows or columns) to the selection when shift clicking
   * in OS selection style
   *
   * @param  {DataTable.Api} dt   DataTable
   * @param  {string}        type Row or column range selector
   * @param  {object}        idx  Item index to select to
   * @param  {object}        last Item index to select from
   * @private
   */
  function rowColumnRange(dt, type, idx, last) {
    // Add a range of rows from the last selected row to this one
    var indexes = dt[type + 's']({search: 'applied'}).indexes();
    var idx1 = $.inArray(last, indexes);
    var idx2 = $.inArray(idx, indexes);

    if (!dt[type + 's']({selected: true}).any() && idx1 === -1) {
      // select from top to here - slightly odd, but both Windows and Mac OS
      // do this
      indexes.splice($.inArray(idx, indexes) + 1, indexes.length);
    } else {
      // reverse so we can shift click 'up' as well as down
      if (idx1 > idx2) {
        var tmp = idx2;
        idx2 = idx1;
        idx1 = tmp;
      }

      indexes.splice(idx2 + 1, indexes.length);
      indexes.splice(0, idx1);
    }

    if (!dt[type](idx, {selected: true}).any()) {
      // Select range
      dt[type + 's'](indexes).select();
    } else {
      // Deselect range - need to keep the clicked on row selected
      indexes.splice($.inArray(idx, indexes), 1);
      dt[type + 's'](indexes).deselect();
    }
  }

  /**
   * Clear all selected items
   *
   * @param  {DataTable.settings} ctx Settings object of the host DataTable
   * @param  {boolean} [force=false] Force the de-selection to happen, regardless
   *     of selection style
   * @private
   */
  function clear(ctx, force) {
    if (force || ctx._select.style === 'single') {
      var api = new DataTable.Api(ctx);

      api.rows({selected: true}).deselect();
      api.columns({selected: true}).deselect();
      api.cells({selected: true}).deselect();
    }
  }

  /**
   * Select items based on the current configuration for style and items.
   *
   * @param  {object}             e    Mouse event object
   * @param  {DataTables.Api}     dt   DataTable
   * @param  {DataTable.settings} ctx  Settings object of the host DataTable
   * @param  {string}             type Items to select
   * @param  {int|object}         idx  Index of the item to select
   * @private
   */
  function typeSelect(e, dt, ctx, type, idx) {
    var style = dt.select.style();
    var toggleable = dt.select.toggleable();
    var isSelected = dt[type](idx, {selected: true}).any();

    if (isSelected && !toggleable) {
      return;
    }

    if (style === 'os') {
      if (e.ctrlKey || e.metaKey) {
        // Add or remove from the selection
        dt[type](idx).select(!isSelected);
      } else if (e.shiftKey) {
        if (type === 'cell') {
          cellRange(dt, idx, ctx._select_lastCell || null);
        } else {
          rowColumnRange(dt, type, idx, ctx._select_lastCell ?
            ctx._select_lastCell[type] :
            null
          );
        }
      } else {
        // No cmd or shift click - deselect if selected, or select
        // this row only
        var selected = dt[type + 's']({selected: true});

        if (isSelected && selected.flatten().length === 1) {
          dt[type](idx).deselect();
        } else {
          selected.deselect();
          dt[type](idx).select();
        }
      }
    } else if (style == 'multi+shift') {
      if (e.shiftKey) {
        if (type === 'cell') {
          cellRange(dt, idx, ctx._select_lastCell || null);
        } else {
          rowColumnRange(dt, type, idx, ctx._select_lastCell ?
            ctx._select_lastCell[type] :
            null
          );
        }
      } else {
        dt[type](idx).select(!isSelected);
      }
    } else {
      dt[type](idx).select(!isSelected);
    }
  }

  function _safeId(node) {
    return node.id.replace(/[^a-zA-Z0-9\-\_]/g, '-');
  }


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * DataTables selectors
   */

// row and column are basically identical just assigned to different properties
// and checking a different array, so we can dynamically create the functions to
// reduce the code size
  $.each([
    {type: 'row', prop: 'aoData'},
    {type: 'column', prop: 'aoColumns'}
  ], function (i, o) {
    DataTable.ext.selector[o.type].push(function (settings, opts, indexes) {
      var selected = opts.selected;
      var data;
      var out = [];

      if (selected !== true && selected !== false) {
        return indexes;
      }

      for (var i = 0, ien = indexes.length; i < ien; i++) {
        data = settings[o.prop][indexes[i]];

        if ((selected === true && data._select_selected === true) ||
          (selected === false && !data._select_selected)
        ) {
          out.push(indexes[i]);
        }
      }

      return out;
    });
  });

  DataTable.ext.selector.cell.push(function (settings, opts, cells) {
    var selected = opts.selected;
    var rowData;
    var out = [];

    if (selected === undefined) {
      return cells;
    }

    for (var i = 0, ien = cells.length; i < ien; i++) {
      rowData = settings.aoData[cells[i].row];

      if ((selected === true && rowData._selected_cells && rowData._selected_cells[cells[i].column] === true) ||
        (selected === false && (!rowData._selected_cells || !rowData._selected_cells[cells[i].column]))
      ) {
        out.push(cells[i]);
      }
    }

    return out;
  });


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * DataTables API
   *
   * For complete documentation, please refer to the docs/api directory or the
   * DataTables site
   */

// Local variables to improve compression
  var apiRegister = DataTable.Api.register;
  var apiRegisterPlural = DataTable.Api.registerPlural;

  apiRegister('select()', function () {
    return this.iterator('table', function (ctx) {
      DataTable.select.init(new DataTable.Api(ctx));
    });
  });

  apiRegister('select.blurable()', function (flag) {
    if (flag === undefined) {
      return this.context[0]._select.blurable;
    }

    return this.iterator('table', function (ctx) {
      ctx._select.blurable = flag;
    });
  });

  apiRegister('select.toggleable()', function (flag) {
    if (flag === undefined) {
      return this.context[0]._select.toggleable;
    }

    return this.iterator('table', function (ctx) {
      ctx._select.toggleable = flag;
    });
  });

  apiRegister('select.info()', function (flag) {
    if (info === undefined) {
      return this.context[0]._select.info;
    }

    return this.iterator('table', function (ctx) {
      ctx._select.info = flag;
    });
  });

  apiRegister('select.items()', function (items) {
    if (items === undefined) {
      return this.context[0]._select.items;
    }

    return this.iterator('table', function (ctx) {
      ctx._select.items = items;

      eventTrigger(new DataTable.Api(ctx), 'selectItems', [items]);
    });
  });

// Takes effect from the _next_ selection. None disables future selection, but
// does not clear the current selection. Use the `deselect` methods for that
  apiRegister('select.style()', function (style) {
    if (style === undefined) {
      return this.context[0]._select.style;
    }

    return this.iterator('table', function (ctx) {
      ctx._select.style = style;

      if (!ctx._select_init) {
        init(ctx);
      }

      // Add / remove mouse event handlers. They aren't required when only
      // API selection is available
      var dt = new DataTable.Api(ctx);
      disableMouseSelection(dt);

      if (style !== 'api') {
        enableMouseSelection(dt);
      }

      eventTrigger(new DataTable.Api(ctx), 'selectStyle', [style]);
    });
  });

  apiRegister('select.selector()', function (selector) {
    if (selector === undefined) {
      return this.context[0]._select.selector;
    }

    return this.iterator('table', function (ctx) {
      disableMouseSelection(new DataTable.Api(ctx));

      ctx._select.selector = selector;

      if (ctx._select.style !== 'api') {
        enableMouseSelection(new DataTable.Api(ctx));
      }
    });
  });


  apiRegisterPlural('rows().select()', 'row().select()', function (select) {
    var api = this;

    if (select === false) {
      return this.deselect();
    }

    this.iterator('row', function (ctx, idx) {
      clear(ctx);

      ctx.aoData[idx]._select_selected = true;
      $(ctx.aoData[idx].nTr).addClass(ctx._select.className);
    });

    this.iterator('table', function (ctx, i) {
      eventTrigger(api, 'select', ['row', api[i]], true);
    });

    return this;
  });

  apiRegisterPlural('columns().select()', 'column().select()', function (select) {
    var api = this;

    if (select === false) {
      return this.deselect();
    }

    this.iterator('column', function (ctx, idx) {
      clear(ctx);

      ctx.aoColumns[idx]._select_selected = true;

      var column = new DataTable.Api(ctx).column(idx);

      $(column.header()).addClass(ctx._select.className);
      $(column.footer()).addClass(ctx._select.className);

      column.nodes().to$().addClass(ctx._select.className);
    });

    this.iterator('table', function (ctx, i) {
      eventTrigger(api, 'select', ['column', api[i]], true);
    });

    return this;
  });

  apiRegisterPlural('cells().select()', 'cell().select()', function (select) {
    var api = this;

    if (select === false) {
      return this.deselect();
    }

    this.iterator('cell', function (ctx, rowIdx, colIdx) {
      clear(ctx);

      var data = ctx.aoData[rowIdx];

      if (data._selected_cells === undefined) {
        data._selected_cells = [];
      }

      data._selected_cells[colIdx] = true;

      if (data.anCells) {
        $(data.anCells[colIdx]).addClass(ctx._select.className);
      }
    });

    this.iterator('table', function (ctx, i) {
      eventTrigger(api, 'select', ['cell', api[i]], true);
    });

    return this;
  });


  apiRegisterPlural('rows().deselect()', 'row().deselect()', function () {
    var api = this;

    this.iterator('row', function (ctx, idx) {
      ctx.aoData[idx]._select_selected = false;
      $(ctx.aoData[idx].nTr).removeClass(ctx._select.className);
    });

    this.iterator('table', function (ctx, i) {
      eventTrigger(api, 'deselect', ['row', api[i]], true);
    });

    return this;
  });

  apiRegisterPlural('columns().deselect()', 'column().deselect()', function () {
    var api = this;

    this.iterator('column', function (ctx, idx) {
      ctx.aoColumns[idx]._select_selected = false;

      var api = new DataTable.Api(ctx);
      var column = api.column(idx);

      $(column.header()).removeClass(ctx._select.className);
      $(column.footer()).removeClass(ctx._select.className);

      // Need to loop over each cell, rather than just using
      // `column().nodes()` as cells which are individually selected should
      // not have the `selected` class removed from them
      api.cells(null, idx).indexes().each(function (cellIdx) {
        var data = ctx.aoData[cellIdx.row];
        var cellSelected = data._selected_cells;

        if (data.anCells && (!cellSelected || !cellSelected[cellIdx.column])) {
          $(data.anCells[cellIdx.column]).removeClass(ctx._select.className);
        }
      });
    });

    this.iterator('table', function (ctx, i) {
      eventTrigger(api, 'deselect', ['column', api[i]], true);
    });

    return this;
  });

  apiRegisterPlural('cells().deselect()', 'cell().deselect()', function () {
    var api = this;

    this.iterator('cell', function (ctx, rowIdx, colIdx) {
      var data = ctx.aoData[rowIdx];

      data._selected_cells[colIdx] = false;

      // Remove class only if the cells exist, and the cell is not column
      // selected, in which case the class should remain (since it is selected
      // in the column)
      if (data.anCells && !ctx.aoColumns[colIdx]._select_selected) {
        $(data.anCells[colIdx]).removeClass(ctx._select.className);
      }
    });

    this.iterator('table', function (ctx, i) {
      eventTrigger(api, 'deselect', ['cell', api[i]], true);
    });

    return this;
  });


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Buttons
   */
  function i18n(label, def) {
    return function (dt) {
      return dt.i18n('buttons.' + label, def);
    };
  }

// Common events with suitable namespaces
  function namespacedEvents(config) {
    var unique = config._eventNamespace;

    return 'draw.dt.DT' + unique + ' select.dt.DT' + unique + ' deselect.dt.DT' + unique;
  }

  function enabled(dt, config) {
    if ($.inArray('rows', config.limitTo) !== -1 && dt.rows({selected: true}).any()) {
      return true;
    }

    if ($.inArray('columns', config.limitTo) !== -1 && dt.columns({selected: true}).any()) {
      return true;
    }

    if ($.inArray('cells', config.limitTo) !== -1 && dt.cells({selected: true}).any()) {
      return true;
    }

    return false;
  }

  var _buttonNamespace = 0;

  $.extend(DataTable.ext.buttons, {
    selected: {
      text: i18n('selected', 'Selected'),
      className: 'buttons-selected',
      limitTo: ['rows', 'columns', 'cells'],
      init: function (dt, node, config) {
        var that = this;
        config._eventNamespace = '.select' + (_buttonNamespace++);

        // .DT namespace listeners are removed by DataTables automatically
        // on table destroy
        dt.on(namespacedEvents(config), function () {
          that.enable(enabled(dt, config));
        });

        this.disable();
      },
      destroy: function (dt, node, config) {
        dt.off(config._eventNamespace);
      }
    },
    selectedSingle: {
      text: i18n('selectedSingle', 'Selected single'),
      className: 'buttons-selected-single',
      init: function (dt, node, config) {
        var that = this;
        config._eventNamespace = '.select' + (_buttonNamespace++);

        dt.on(namespacedEvents(config), function () {
          var count = dt.rows({selected: true}).flatten().length +
            dt.columns({selected: true}).flatten().length +
            dt.cells({selected: true}).flatten().length;

          that.enable(count === 1);
        });

        this.disable();
      },
      destroy: function (dt, node, config) {
        dt.off(config._eventNamespace);
      }
    },
    selectAll: {
      text: i18n('selectAll', 'Select all'),
      className: 'buttons-select-all',
      action: function () {
        var items = this.select.items();
        this[items + 's']().select();
      }
    },
    selectNone: {
      text: i18n('selectNone', 'Deselect all'),
      className: 'buttons-select-none',
      action: function () {
        clear(this.settings()[0], true);
      },
      init: function (dt, node, config) {
        var that = this;
        config._eventNamespace = '.select' + (_buttonNamespace++);

        dt.on(namespacedEvents(config), function () {
          var count = dt.rows({selected: true}).flatten().length +
            dt.columns({selected: true}).flatten().length +
            dt.cells({selected: true}).flatten().length;

          that.enable(count > 0);
        });

        this.disable();
      },
      destroy: function (dt, node, config) {
        dt.off(config._eventNamespace);
      }
    }
  });

  $.each(['Row', 'Column', 'Cell'], function (i, item) {
    var lc = item.toLowerCase();

    DataTable.ext.buttons['select' + item + 's'] = {
      text: i18n('select' + item + 's', 'Select ' + lc + 's'),
      className: 'buttons-select-' + lc + 's',
      action: function () {
        this.select.items(lc);
      },
      init: function (dt) {
        var that = this;

        dt.on('selectItems.dt.DT', function (e, ctx, items) {
          that.active(items === lc);
        });
      }
    };
  });


  /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Initialisation
   */

// DataTables creation - check if select has been defined in the options. Note
// this required that the table be in the document! If it isn't then something
// needs to trigger this method unfortunately. The next major release of
// DataTables will rework the events and address this.
  $(document).on('preInit.dt.dtSelect', function (e, ctx) {
    if (e.namespace !== 'dt') {
      return;
    }

    DataTable.select.init(new DataTable.Api(ctx));
  });


  return DataTable.select;
}));
